<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>position</title>
	<style type="text/css">
		.box{
			width: 200px;
			height: 200px;
			background-color: yellow;
			position: absolute;
			left: 200px;
			top:10px;
		}
		.box1{
			width: 300px;
			height: 300px;
			position: relative;
			background: gray url() 0 0 no-repeat;
		}
		.box3{
			width: 100px;
			height: 100px;
			background-color: red;
			position: absolute;
			left: 10px;
			top: 20px;
		}
		.box2{
			width: 100px;
			height: 100px;
			background-color: blue;
			position: fixed;
			left: 100px;
			top: 500px;

		}
	</style>
</head>
<body>
	<P>学并思1</P>
	<P>学并思2</P>
	<P>学并思3</P>
	<P>学并思4</P>
	<P>学并思5</P>
	<P>学并思6</P>
	<P>学并思7</P>
	<P>学并思8</P>
	<P>学并思9</P>
	<P>学并思10</P>
	<div class="box">box</div>
	<div class="box1">
	<strong>box1</strong>
		<div class="box3">box3</div>
	</div>
	<P>学并思11</P>
	<P>学并思12</P>
	<P>学并思13</P>
	<div class="box2">
		<span>box2</span>
	</div>
	<P>学并思14</P>
	<P>学并思15</P>
	<P>学并思16</P>
	<P>学并思17</P>
	<P>学并思18</P>
	<P>学并思19</P>
	<P>学并思20</P>0
	

	
</body>
</html>